393109252 has 12 divisors (see below), whose sum is σ = 688080960. Its totient is φ = 196514696.

The previous prime is 393109243. The next prime is 393109267. The reversal of 393109252 is 252901393.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29649 + ... + 40807.

It is an arithmetic number, because the mean of its divisors is an integer number (57340080).

Almost surely, 2^393109252 is an apocalyptic number.

It is an amenable number.

393109252 is a deficient number, since it is larger than the sum of its proper divisors (294971708).

393109252 is a wasteful number, since it uses less digits than its factorization.

393109252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19970 (or 19968 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 393109252 is about 19826.9829273140. The cubic root of 393109252 is about 732.5508136850.

The spelling of 393109252 in words is "three hundred ninety-three million, one hundred nine thousand, two hundred fifty-two".